Event: Division 4

Opponent Rating Result
Lars Astrom 2098 0 - 1
Jake Stones 1808 ½ - ½
Richard Jerram 1742 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1749 = (5648 + 400 * (0 - 1)) / 3)

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